LETTUCE, BUTTERHEAD (INCLUDES BOSTON AND BIBB TYPES), RAW  USDA NUTRITIONAL DATA

Lettuce, butterhead (includes boston and bibb types), raw contains 13 calories per 100 g serving. This serving includes 1.4 g of protein, 0.2 g of fat, and 2.2 g of carbohydrates. Of these carbs 1.1 g is fiber. The net carbs of a food are the number of carbohydrates less the number of carbs that come from fiber. So for this serving that net carbs value is 1.1 g. A 100 g serving of Lettuce, butterhead (includes boston and bibb types), raw includes 166.0 mcg vitamin A, 3.7 mg vitamin C, 13.0 mg of magnesium, 1.2 mg of iron, and 35.0 mg of calcium. Lettuce, butterhead (includes boston and bibb types), raw is a part of the Vegetables and Vegetable Products food category.

Daily value (DV) refers to how much of a nutrient an average adult should consume, assuming a 2,000 calorie daily diet.
All nutrition data is for a 100 gm serving, as per the USDA
Basics
Nutrient
Amount
DV %
Calories
13
 
Total Fat
0.2 gm
0.3 %
Sodium
5.0 mg
0.2 %
Total Carbohydrates
2.2 gm
0.8 %
Protein
1.4 gm
2.7 %
Cholesterol
0.0 gm
0.0 %
Vitamins
Nutrient
Amount
DV %
Vitamin A, RAE
166.0 mcg
18.4 %
Thiamin   [Vitamin B1]
0.1 mg
4.8 %
Riboflavin   [Vitamin B2]
0.1 mg
4.8 %
Niacin   [Vitamin B3]
0.4 mg
2.2 %
Pantothenic Acid   [Vitamin B5]
0.2 mg
3.0 %
Vitamin B6
0.1 mg
4.8 %
Folate   [Vitamin B9]
73.0 mcg
18.3 %
Vitamin B12
0.0 mcg
0.0 %
Vitamin C
3.7 gm
4.1 %
Vitamin D
0.0 mcg
0.0 %
Vitamin E
0.2 gm
1.2 %
Vitamin K
102.3 mg
85.3 %
Choline
8.4 mg
1.5 %
Minerals
Nutrient
Amount
DV %
Calcium   [Ca]
35.0 mg
2.7 %
Copper   [Cu]
0.0 mcg
1.8 %
Iron   [Fe]
1.2 mg
6.9 %
Magnesium   [Mg]
13.0 mg
3.1 %
Phosphorus   [P]
33.0 mg
2.6 %
Potassium   [K]
238.0 mg
5.1 %
Selenium    [Se]
0.6 mcg
1.1 %
Sodium   [Na]
5.0 mg
0.2 %
Zinc   [Zn]
0.2 mg
1.8 %
Carbohydrates
Nutrient
Amount
DV %
Carbohydrates
2.2 gm
0.8 %
Fiber
1.1 gm
3.9 %
Sugars
0.9 gm
 
Net Carbs
1.1 gm
 
Fats and Fatty Acids
Nutrient
Amount
DV %
Fat
0.2 gm
0.3 %
Saturated Fatty Acids
0.0 gm
0.1 %
Monounsaturated Fatty Acids
0.0 gm
 
Polyunsaturated Fatty Acids
0.1 gm